When you move your muscles, it pumps fresh blood and oxygen to the brain. This triggers brain- and mood-enhancing chemicals. Too much time sitting down slows everything down, including brain function. VladimirFLoyd Getty Images/iStockphoto

Too much sitting can lead to an inflexible spine. Sitting does not allow the soft discs between your vertebrae to expand and contract like sponges, soaking up fresh blood and nutrients. Fuse Getty Images/Fuse

A bad diet isn't the only culprit of flabby abs. When you sit, the abdominal muscles used to help you stand upright are not used. This can lead to poor posture and swayback. 2e812ac3_768 Getty Images/iStockphoto

Have a meeting? Take a walk. Corporate director and author Nilofer Merchant discusses the benefits of walking meetings in her February 2013 TED Talk. For more information, go here http://www.ted.com/talks/nilofer_merchant_got_a_meeting_take_a_walk. sjenner13 Getty Images/iStockphoto